DE9002538U1 - Bunghole detection device - Google Patents

Description

: PATENT ATTORNEYS

DIERK HANSMANN -GEORG HANSMANN DlPL-ING. EUROPEAN PATENT ATTORNEY (t 1977) JESSENSTRASSE 4 · 2000 HAMBURG SO · TEU (040) 38 24 57 · FAX (040) 3 89 35 02 · TELEX 2166 426 pahn d

G.4925

O Applicant in the '&idigr;"*5. Fördertechnik Haisburg GmbH

Tornesch.r Wec 5^7 D-2082 &Ggr; heels

Bunghole detection device

The innovation relates to a bunghole detection device for barrels with a bunghole detector on the barrel surface (\ a carrier held in a concentric circle with the radius of the bunghole center, which can be lifted and adjusted to the horizontal starting position and has switching elements arranged at a distance for detecting the bunghole and, via a control device, stops a rotational movement of a holder for the FaB after the bunghole has been detected.

Such an arrangement is already known from DE-PS 36 31 338. It is used, for example, in barrel filling and barrel closing devices. The bunghole of the barrel is searched for and its position is reported, which makes it possible to carry out the subsequent

VEREINS- UND WESTtWNK AG 11/14230 <6llz 20*300 00)' "". ; '. .' DEUTSCHE BANK AQ 65 06 224 (BLZ 200 700 00) POSTGmOAMT HftMBWF»GM76 66·205>(&thetas;-&Zgr; 200 100 20)

to lower tools such as opening, centering, filling and closing devices precisely onto the bunghole.

It has been shown that the known arrangements are functional for conventional barrels in which the bunghole protrudes upwards, as well as for sunken bungholes with a so-called trench. However, there is the disadvantage that a large number of mechanical switching elements must be used to determine the bunghole, and thus there is a high risk of failure.

The aim of the innovation is to create a simple, functional device of the generic type while eliminating mechanical switching elements.

The solution to this problem is that the carrier as a sliding carriage has at least three light sensors arranged one behind the other with set scanning distances, which face the barrel surface, with the middle light sensor being assigned to the bunghole center and the outer light sensors being assigned to the bunghole edge.

This makes it possible to control a corresponding control device via stationary switching elements, which do not require mechanical adjustment.

In order to take the special conditions into account, it is suggested that the middle light sensor for the bunghole be set to a smaller scanning range than the outer light sensors. This provides additional security during the detection, since the plug reflects more strongly than the barrel surface.

An advantageous arrangement taking start-up times into account is created by the distance between the light sensor that corresponds first to a bunghole edge in the sequence and the middle light sensor being slightly larger than the distance to the following light sensor.

To facilitate adjustment of the light sensors _, the glass slide of the recording device for the respective light sensor is designed as an elongated hole.

The drawing shows a schematic example of the innovation. Show:

Fig. 1 is a plan view of a rotating barrel with a search device and

Fig. 2 is a side view of a search device with a bunghole.

The barrel 1 is mounted on a rotating device (not shown in detail) which rotates around the center in the direction of the arrow. A carrier 3 moves on the barrel surface 2 as a sliding carriage, which is shown in Fig. 1 with its longitudinal extension.

The sliding carriage 3 is held stationary above the barrel 1 with a bunghole 4 and thus moves when the barrel 1 rotates around the barrel center, the radius of which corresponds to the distance of the bunghole center.

The correct rolling position of the barrel 1 for finding the bunghole 4 is then set by a control device 5 using the search device explained below.

In this case, the sliding carriage 3 is height-adjustable and suspended in a pendulum manner via guide elements 6 and corresponding return springs in order to enable the necessary adjustment. The sliding carriage 3 accommodates light sensors 8, 9 and 10 in spaced-apart slots 7 along its length, which are shown schematically and are electrically connected to the control device. The light buttons 8 to 10 are so-called reflex light barriers consisting of glass fiber optic cables with a downstream switching amplifier with integrated light transmitter and receiver, which can be set to a threshold value.

The light sensors 8 and 10 are arranged at a distance corresponding to the bunghole edge 11 and accommodate the light sensor 9 for the bunghole approximately in the middle. When the barrel 1 is rotated, the light sensors 8 to 10 are approached in the order 8, 9, 10. At the beginning, the bunghole edge 11 as the front edge of the stopper is moved under the light sensor 8. A signal is generated and then the light sensor 8 is released again and is located above the recess of the bunghole 4. The light sensor 9 moves over the bunghole edge 11 as the front edge of the stopper. A time is set in motion via the control device 5 in order to specify the time in which a further pulse must be given to detect the bunghole 4. If the light sensor 8 detects the bunghole edge 11 as the rear edge of the stopper and the light sensor 10 detects the front edge of the stopper, the signal "bunghole found" is generated in the control device 5, which stops the rotating device for the barrel 1 and disengages the sliding carriage 3 from the bunghole 4 so that a desired treatment device, such as a filling tube, a screwdriver or the like, can be used.

Clinched bung holes 4 are therefore not detected because the signals from the middle light sensor 9 are not transmitted correctly.

Of course, it is possible to provide additional controls or load reductions by only giving the stop signal for the barrel 1 rotation device after all light switches 8 to 10 have been released and the stopper front and rear edges have been released.

Claims (4)

CIERK HÄNSMÄWN '-: G E O ft G DIPL-ING. EUROPEAN PATENT ATTORNEY {\ 197;) JESSENSTRASSE 4 · 20OO HAMBURG 50 · TEL. (040) 38 24 S7 FAX (040) 3 89 35 02 TELEX 2 166 426 pahn d G.4925 Applicant: FTH Fördertechnik Hamburg GmbH
Tornescher Weg 5-7
D-2082 uetersen Protection claims 1. Bunghole search device for barrels with a carrier held on the barrel surface on a concentric circle with the radius of the bunghole center, which can be lifted and adjusted to the horizontal starting position and has spaced-apart switching elements for detecting the bunghole and stops a rotational movement of a holder for the barrel after the bunghole has been detected via a control device, characterized in that the carrier (3) as a sliding carriage has at least three light sensors (8, 9, 10) arranged one behind the other with set scanning distances, which face the barrel surface, the middle light sensor (9) being assigned to the bunghole edge (4) and the outer light sensors (8, 10) being assigned to the bunghole edge (11) of the bunghole position being searched for. VEREINS- UND WESTBANK AG 11/1423O*(Bljz|2o4 ioOJOO) .* '"". _< *. .DEUTSCHE BANK AG oö u6 224 (BLZ 200 700 00) POSTGIROAiJh» HAMBURG W© 65-fiO5 *(Bti 200 100 20) 2. Bung hole search device according to claim 1, characterized in that the middle light sensor (9) for the bung hole (4) is set with a smaller scanning range than the outer light sensors (8, 10). 3. Bung hole search device according to claim 1 or 2, characterized in that the distance between the light sensor (8) corresponding first in the sequence to a bung hole edge (11) to the middle light sensor (9) is slightly larger than the distance to the following light sensor (10). 4. Bung hole search device according to one of claims ] to 3, characterized in that in the slide carriage (3) the receiving area for the respective light sensor (8,9,10) is designed as an elongated hole.